Dramatic spike in hard bounces??
A block bounce, which is considered a type of soft bounce, occurs when the email server rejects the email due to filter issues, such as URL blocks, lack of proper authentication, or the domain or IP address is found on a blacklist utilized by the receiving domain. A subscriber who receives a block bounce is retried in the next email send.
Please check the below for reasons of your block bounce:
Complaint: Your email is blocked due to complaints
BlacklistIP: address is on a blacklist
Content: Message was filtered due to content
URL Block: Emails containing your URLs are blocked
Authentication: Message lacks required authentication
please check with this link (https://help.salesforce.com/articleView?id=mc_es_bounce_mail_management.htm&type=5)
Thanks & Regards
This is a self-service community for customers to help each other, whilst generating reusable content.
Not for sales nor selfpromoting businesses, please stop this approach.
If you are registered the AppExchange team can help you with an actual go to market strategy that wont damage your brand.